Oil leak
Thread Starter
7th Gear
Joined: Nov 2005
Posts: 7
Likes: 0
From: orlando florida
Oil leak
Hello all i have a 94 c4 my first vet but it has a oil leak on the left side of the engine and it drips on the cat and the smoke well not too good.
is this a porblem with LT1 engines and what is the fix.
Thank you for the help with this problem.
is this a porblem with LT1 engines and what is the fix.
Thank you for the help with this problem.
Thread Starter
7th Gear
Joined: Nov 2005
Posts: 7
Likes: 0
From: orlando florida
Thank you i will check into that im a old timer engine guy 67 firebirds
is all i worked on but now that im old and my 94 is cool looking to me
time to hit the books.
Thank you for the help.
is all i worked on but now that im old and my 94 is cool looking to me
time to hit the books.
Thank you for the help.
Advanced
Joined: Sep 2002
Posts: 77
Likes: 0
From: Los Angeles CA
It could be the oil pressure sending unit. It is located above the oil filter. I am having the same problem. Oil leaking on the cat. (smoking) and coming down the oil filter and the fly wheel cover. It only leaks when the car has been driven.
Instructor
Joined: Oct 2005
Posts: 143
Likes: 0
From: Lincolnshire,ENGLAND
Never thought about the oil pressure sender though? Whats the fix for that?
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,009
From: Texas
The oil pressure sending unit is ***not*** located above the oil filter. That is the oil temp sensor.
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Cruising
Joined: Apr 2007
Posts: 14
Likes: 0
From: Barkhamsted Ct
Oil Leaks at 70K
I just spent the better part of this Saturday morning fixing that same oil leak on my 94. I've already resealed the intake months ago (seeing some oil behind it), however confusing as it might be, mine didn't leak running on the lift for a half an hour at idle, only after a short drive. I purchased the oil filter adapter housing seal and gasket from GM for $5.00 and after installing them I went for a two mile drive and put the car back up on the lift, so far so good. I then went for a 20 mile ride and the oil leak is now fixed. The oil temp sensor just above the oil filter adapter housing is sealed on the back side unlike the oil pressure sending unit and unless the threads are leaking I don't see how it can leak. As a veteran 35 year mechanic and transmission shop owner, I live for these problems, just wish it wasn't my car.
Pro
Joined: Dec 2002
Posts: 704
Likes: 16
From: Dallas Texas
I have an oil leak at the intake. I put new head gaskets in my engine and new heads (AFR-220s) and a ports LT4 intake. changed intake gasket recently and it cured the oil leak for a while and now it is back. just shoot me!
Cruising
Joined: Apr 2007
Posts: 14
Likes: 0
From: Barkhamsted Ct
Intake leaks
Make sure to use the recommended sealer on the front and rear of the intake or you may end up with an oil leak soon after installing new intake gaskets. GM uses a grey silicone sealer, pn/12346141, comes in a small tube for the extra large gap and do clean it with brake clean first and after you install the intake let it dry at least over night.